//
// Created by ChaoDONG on 2021-03-24.
//
/* fields.c -- define and use fields */
#include <stdio.h>
#include <stdbool.h> //C99, defines bool, true, false
/* line styles */
#define SOLID 0
#define DOTTED 1
#define DASHED 2
/* primary colors */
#define BLUE 4
#define GREEN 2
#define RED 1
/* mixed colors */
#define BLACK 0
#define YELLOW (RED | GREEN)
#define MAGENTA (RED | BLUE)
#define CYAN (GREEN | BLUE)
#define WHITE (RED | GREEN | BLUE)
const char * colors[8] = {"black", "red", "green", "yellow",
                          "blue", "magenta", "cyan", "white"};
struct box_props {
    bool opaque : 1; // or unsigned int (pre C99)
    unsigned int fill_color : 3;
    unsigned int : 4;
    bool show_border : 1; // or unsigned int (pre C99)
    unsigned int border_color : 3;
    unsigned int border_style : 2;
    unsigned int : 2;
};
void show_settings(const struct box_props * pb);

int main(void)
{
/* create and initialize box_props structure */
    struct box_props box = {true, YELLOW , true, GREEN, DASHED};
    printf("Original box settings:\n");
    show_settings(&box);
    box.opaque = false;
    box.fill_color = WHITE;
    box.border_color = MAGENTA;
    box.border_style = SOLID;
    printf("\nModified box settings:\n");
    show_settings(&box);
    return 0;
}

void show_settings(const struct box_props * pb)
{
    printf("Box is %s.\n",
           pb->opaque == true ? "opaque": "transparent");
    printf("The fill color is %s.\n", colors[pb->fill_color]);
    printf("Border %s.\n",
           pb->show_border == true ? "shown" : "not shown");
    printf("The border color is %s.\n", colors[pb->border_color]);
    printf ("The border style is ");
    switch(pb->border_style)
    {
        case SOLID : printf("solid.\n"); break;
        case DOTTED : printf("dotted.\n"); break;
        case DASHED : printf("dashed.\n"); break;
        default : printf("unknown type.\n");
    }
}


